package org.hot100_5.leetcode226;

import org.leetcode.TreeNode;

public class Solution {
    public TreeNode invertTree(TreeNode root) {

        if (root==null){
            return null;
        }

        TreeNode temp = root.left;
        root.left = root.right;
        root.right = temp;

        invertTree(root.left);
        invertTree(root.right);

        return root;
    }
}
